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896f2b202d
* fix: update only/onlyID comments
this patch updates the Only/OnlyID methods in the builder template from:
> // Returns a *NotSingularError when exactly one {{ $.Name }} entity is not found.
to
> // Returns a *NotSingularError when more than exactly one {{ $.Name }} ID is found.
in an effort to be more explicit in the explanation of the behavior of the methods.
* fix: update wording to be more concise from suggestion
Co-authored-by: Rotem Tamir <rotemtamir@gmail.com>
* fix: update Only wording to be more concicse
* fix: generate new files
Co-authored-by: Rotem Tamir <rotemtamir@gmail.com>
Optimistic Lock
In this example, we implement an optimistic locking mechanism using the technique mentioned in Ent Blog.
The idea is to add to our schema a version field that holds the Unix time of when the latest update occurred.
When an Update operation is executed, the hook updates the version field with the new value and adds a predicate
to verify that the version wasn't updated by another process/transaction during the mutation.
An error is returned if the versions are mismatched, and the user should reload the entity and retry the mutation.
Generate Assets
go generate ./...
Run Example
go test